Have you heard of the ‘anti-gravity lean’? This is the iconic dance move performed by Michael Jackson in his Smooth Criminal video in which The King of Pop leant forward at a 45-degree angle.

We know what you're thinking: how is this possible? Indian neurosurgeons have been trying to answer this question for the BBC... and they think they may have cracked the case.

According to them, the best of the best dancers can only lean forward about 25 or 30 degrees maximum before they fall over. How was it that Michael Jackson could seemingly exceed what would be considered the human limit?

Researcher Manjul Tripathi explains: Michael Jackson managed to perform this dance move not by concentrating the tension on his back muscles, but by putting weights into the heels of his shoes to allow him to lean further!

That's not all - the King of Pop also has another secret. A v-shaped slit in the bottom of each heel was also put in which allowed him to pivot and lean further forward along a strong nail in the ground. Not bad, right?